Question No BOOT, No beep and No Display (Asus B450 TUF PRO)

Closery

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Jul 25, 2019
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Hey guys,
One of my friends call me and said "bro I get back from work and start the PC but no display" and he brought me the computer which I build for him like 4 years ago.

The specs was:
R5 1600,
Msi B350 Mobo,
ASUS GTX 1060 6GB
Corsair 16 GB DDR4
500w (400w on 12v) 80+ bronze PSU
Recently like couple months ago we upgrade the CPU and the Motherboard with R7 2700X and ASUS B450 TUF PRO. Everything was working fine until now. First I suspect the PSU because I couldn't trust the PSU Brand (even with that 80+ cert) and told him when we upgrade you should probably change the PSU because system more likely has peak power of 320-350w and this PSU is 500w but 400w on 12V, its kinda in edge so it could fail someday, so he bought new PSU which is Aerocool White 650W 80+ but nothing change.

When he brought the PC to me, first I disassembly everything from pc case and build the crucial parts on table and put a speaker (mobo buzzer) on speaker port to hear some beep sound. Power up the mobo, everything looks fine, lights on, GPU lights on and fans spining but no display and no beep sound. (no error sound and no approve sound)

So I chacked the RAMs and and GPU on my system and they worked, there is nothing wrong with GPU and RAM. I'm starting to suspect from brand new motherboard which worked only couple months :/

What should I do, what do you guys think about the sitiation? is it motherboard or CPU. What if I power up the motherboard without nothing conencted to it except speaker buzzer to maybe hear some beep?
Thanks in advance

Edit: When I remove the processor and wait for a while and plug it back in I heard 3 beep (I don't remember long short because I wasn't expecting to hear beep) which I think it is not important because no ram was installed anyway. After that no matter what i tried i couldn't hear any sound again...
Edit 2: I heard something about QVL and I checked the list for this motherboard, none of the rams are on list but it's weird because this build work like this couple months. :/
 
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